CVE-2021-20314: Buffer Overflow
First published: Wed Aug 11 2021(Updated: )
Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Libspf2 Libspf2 | <1.2.11 | |
| Redhat Enterprise Linux | =7.0 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 | |
| Fedoraproject Fedora | =35 | |
| ubuntu/libspf2 | <1.2.11 | 1.2.11 |
| ubuntu/libspf2 | <1.2.10-7ubuntu0.18.04.1~ | 1.2.10-7ubuntu0.18.04.1~ |
| ubuntu/libspf2 | <1.2.10-7+ | 1.2.10-7+ |
| ubuntu/libspf2 | <1.2.10-6ubuntu0.1~ | 1.2.10-6ubuntu0.1~ |
| debian/libspf2 | 1.2.10-7.1~deb10u1 1.2.10-7.1~deb11u1 1.2.10-7.2 1.2.10-8 1.2.10-8.2 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=1993070
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMSFT2NJDZ7PATRZSQPAOGSE7JD6ELOB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJRHPE5OSCPTNA3ZZ4ORDHT4JQH3Y4/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y6T4HYXXSUQCGJB2ES6X7Q74YYF7V7XU/
- https://security.gentoo.org/glsa/202401-22
- https://access.redhat.com/security/cve/CVE-2021-20314
- https://seclists.org/oss-sec/2021/q3/94
- https://github.com/shevek/libspf2/commit/c37b7c13c30e225183899364b9f2efdfa85552ef
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1993072
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1993071
- https://launchpad.net/bugs/cve/CVE-2021-20314
- https://www.openwall.com/lists/oss-security/2021/08/11/6
- https://security-tracker.debian.org/tracker/CVE-2021-20314
- https://ubuntu.com/security/notices/USN-6584-1
- https://www.cve.org/CVERecord?id=CVE-2021-20314
- https://nvd.nist.gov/vuln/detail/CVE-2021-20314
- https://ubuntu.com/security/CVE-2021-20314
Frequently Asked Questions
What is CVE-2021-20314?
CVE-2021-20314 is a stack buffer overflow vulnerability in libspf2 versions below 1.2.11 that can lead to denial of service and potentially code execution.
What is the severity of CVE-2021-20314?
CVE-2021-20314 has a severity rating of 9.8 (Critical).
Which software versions are affected by CVE-2021-20314?
Libspf2 versions below 1.2.11, Redhat Enterprise Linux 7.0, and Fedoraproject Fedora 33, 34, and 35 are affected.
How can CVE-2021-20314 be exploited?
CVE-2021-20314 can be exploited by processing certain SPF macros in malicious crafted SPF explanation messages.
Are there any references to learn more about CVE-2021-20314?
Yes, you can find more information on CVE-2021-20314 at the following references: [Bugzilla Redhat](https://bugzilla.redhat.com/show_bug.cgi?id=1993070), [Fedoraproject Fedora 33](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMSFT2NJDZ7PATRZSQPAOGSE7JD6ELOB/), [Fedoraproject Fedora 34](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GFXJRHPE5OSCPTNA3ZZ4ORDHT4JQH3Y4/).
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2021-20314
- agent/remedy
- agent/severity
- agent/last-modified-date
- agent/author
- agent/weakness
- agent/references
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-cve
- agent/tags
- agent/description
- collector/launchpad-cve
- source/Launchpad
- agent/event
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/usn-cve
- source/Ubuntu
- vendor/libspf2
- canonical/libspf2 libspf2
- vendor/redhat
- canonical/redhat enterprise linux
- version/redhat enterprise linux/7.0
- vendor/fedoraproject
- canonical/fedoraproject fedora
- version/fedoraproject fedora/33
- version/fedoraproject fedora/34
- version/fedoraproject fedora/35
- package-manager/debian
- package-manager/ubuntu